JP3547260B2 - X-ray flaw detector for handrail for man conveyor - Google Patents

X-ray flaw detector for handrail for man conveyor Download PDF

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Publication number
JP3547260B2
JP3547260B2 JP16745496A JP16745496A JP3547260B2 JP 3547260 B2 JP3547260 B2 JP 3547260B2 JP 16745496 A JP16745496 A JP 16745496A JP 16745496 A JP16745496 A JP 16745496A JP 3547260 B2 JP3547260 B2 JP 3547260B2
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JP
Japan
Prior art keywords
handrail
ray
flaw detector
ray flaw
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP16745496A
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Japanese (ja)
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JPH1010060A (en
Inventor
豊 平間
時司 田丸
Original Assignee
株式会社日立ビルシステム
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Priority to JP16745496A priority Critical patent/JP3547260B2/en
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Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an X-ray flaw detector for a handrail for a man conveyor for detecting damage to a steel cord embedded in the inside of the handrail.
[0002]
[Prior art]
Generally, in a conveyer such as an escalator, a handrail is provided which moves in the same direction in synchronization with a step of carrying a passenger, and the passenger is prevented from falling over by being caught by the handrail during traveling. This handrail may be out of synchronization with the steps due to temperature fluctuations, long-term use, etc., causing the rubber that composes the handrail to stretch and lose its tension. Steel cords are embedded in the steel cords, but if these steel cords are used for a long period of time, they will break due to metal fatigue due to bending or the like.
[0003]
Therefore, as described in JP-A-6-316394, an exciting means for magnetizing a steel cord embedded in a handrail in a traveling direction to detect damage to the steel cord, and a steel magnetized by the exciting means. There has been proposed a handle checker having a detection coil for detecting a leakage magnetic flux generated from a damaged portion of a cord. When the steel cord in the handrail is magnetized in the running direction, if the steel cord is damaged, a leakage magnetic flux is generated from the damaged portion, and the leakage magnetic flux can be detected by the detection coil. It is also conceivable to use an X-ray flaw detector which irradiates X-rays from outside the handrail to photograph the state of the steel cord in the handrail and observes the film after the photographing to determine the degree of damage.
[0004]
[Problems to be solved by the invention]
However, even if the conventional handle checker can accurately detect the presence or absence of damage, it is difficult to determine whether the damage should require replacement of the handrail early or only in the future. It could not be detected accurately. X-ray flaw detector contrast, can be detected accurately to the extent of the damage, it takes time until the film is developed, it is possible to make an immediate determination by performing inspection of the handrail in situ Did not.
[0005]
An object of the present invention is to provide an X-ray flaw detector for a handrail for a man-conveyor, which can accurately detect damage on a steel cord embedded in the handrail on the spot.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a handrail guided by a handrail guide, and an X-ray flaw detector for a handrail for a man-conveyor for detecting damage to a steel cord in the handrail by an X-ray flaw detector. , The X-ray flaw detector comprises an X-ray generator and an X-ray image receiver arranged via a predetermined facing space, and the X-ray flaw detector is attached to the handrail guide with the handrail removed. And the handrail detached from the handrail guide is arranged in the opposed gap between the X-ray generation unit and the X-ray image receiving unit of the X-ray flaw detector.
[0007]
The X-ray flaw detector for a handrail for a conveyor according to the present invention uses the X-ray flaw detector capable of performing high-precision flaw detection as described above, and the X-ray flaw detector is supported by a handrail guide with the handrail removed. Since the handrail removed from the handrail guide is arranged in the opposing gap between the X-ray generating unit and the X-ray receiving unit of the X-ray flaw detector, the handrail is moved to the X-ray receiving unit without dismantling the handrail from the man conveyor. The condition of the steel cord in the rail can be projected and verified on the spot easily and quickly.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are a front view and a side view, respectively, in which only the upper part of the X-ray flaw detector according to one embodiment of the present invention is cut away.
The X-ray flaw detector 9 includes a lower main body 11 containing an X-ray generating unit 8 including an X-ray tube 17 and a flyback transformer 18 and an X-ray receiving unit 14 including an X-ray display unit 14A and an X-ray emitting unit 14B. And an upper body 10 in which the two parts are connected by hinges 24 at the two rear surfaces thereof. On the front surface corresponding to the hinge 24, a connection fitting 12 for releasably connecting the two is provided. A pair of engaging portions 22A and 22B, an operating portion 21 for driving the engaging portions 22A and 22B in a direction of coming and going, and a rotatable roller located above the engaging portions 22A and 22B are provided at a lower portion of the lower main body 11. 19 is formed. A grip 25 used for carrying is provided on one side surface of the X-ray flaw detector 9, and a plurality of rubber stands 26 used for storage are mounted on the opposite side surface. In the center of the lower end of the upper body 10, an opposing space portion into which a handrail is inserted is formed, and a plurality of shields 16 formed in a strip shape and provided with followability are arranged at the entrance and the exit, respectively. .
[0009]
FIG. 3 shows a circuit diagram of the X-ray generator 8 in the lower body 11. The charger 40 connected to the commercial power supply is connected to the battery 32, the operation switch 41 and the coil 30 of the relay are connected in series with the battery 32, and the contact 31 that closes and self-holds when the coil 30 is excited is activated. It is connected in parallel with the switch 41. Timer 33 made of subtraction counter is able to set the time by setting device 34, this timer 33 are the built is normally closed contact 33S, the normally closed contact 33S is instantly at the end count of the timer 23 Opened to shut off power supply circuit. The count value of the timer 33 can be displayed according to the remaining time display 35. An excitation circuit 36 composed of an inverter switching circuit and the like, a semi-high voltage circuit 37 composed of a flyback transformer 18 and the like, and a high voltage generation circuit 38 composed of a voltage doubler adjustment circuit using a capacitor and the like are connected in series to the battery 32 via a timer 33. Have been. A variable resistor 39 is connected between the cathode side of the X-ray tube 17 and the battery 32, and the solid angle of the X-ray 17X emitted from the X-ray tube 17 is about 40 degrees.
[0010]
When the operation switch 41 is turned on, the coil 30 is excited, the contact 31 is closed, and the coil 30 is held. At the same time, the timer 33 operates, and the remaining time is displayed on the remaining time display 35 for a set time, for example, 120 to 180 seconds. In this state, the voltage of the battery 32 is applied to the excitation circuit 36 via the contact point 31, the coil 30, and the contact point 33S of the timer 33, converted into AC, and 300 V is input to the semi-high voltage circuit 37. The voltage is boosted and converted to a DC high voltage of 30,000 V by the high voltage circuit 38. This high voltage is applied to the anode of the X-ray tube 17, and the X-ray tube 17 irradiates soft X-rays 17X of 20 KeV. When the remaining time of the timer 33 becomes 0, the contact 33S is instantaneously opened, the coil 30 is demagnetized, the self-holding state is released, the contact 31 is opened, and the application of voltage to the X-ray generation unit is stopped, and X The emission of the line 17X is stopped. Also, a current breaker 19 is provided in the lower main body 11, and when the upper main body 10 is opened or the connection fitting 12 is released, the current breaker 19 is activated and the power supply circuit is immediately cut off. I have. When the X-ray 17X is irradiated even after the set time has elapsed, the power can be cut off by an operation switch of the X-ray flaw detector 9 (not shown), or a buzzer 32 can be provided by providing a detection circuit.
[0011]
An X-ray image receiving unit 14 is formed in the upper main body 10 shown in FIG. The X-ray image receiving unit 14 has a plate glass positioned on the X-ray tube 17 side and an X-ray display unit 14A composed of an X-ray display film applied thereon. Consisting of cesium (CaI), zinc sulfide (ZnS) and platinum barium cyanide (Ba [Pt (CN) 4 ], or cesium iodide (CsI), zinc sulfide (ZnS) and calcium tungsten tetroxide (CaWO 4 ); The X-ray emitting portion 14B is configured such that each material is applied in the form of a thin layer or a mixture of each material on the anti-X-ray generating portion side of the sheet glass in sequence. ten thousand V is applied, so as to obtain the sharp image receiving. outer periphery of the X-ray image receiving portion 14 together with is surrounded by the X-ray shielding cylinder 13, the upper portion of the eye viewing direction lead glass 15 shielding Therefore, the X-rays 17X from the X-ray tube 17 described with reference to Fig. 3 reach the X-ray display section 14A of the X-ray image receiving section 14, and the material forming the X-ray display film is excited to generate X-rays. The lines are efficiently converted to fluorescence and thermal energy to form an image.
[0012]
In actual use, as shown in FIG. 11, the handrail 1 in the lower horizontal portion is detached from the handrail guide 45, and the X-ray flaw detector 9 is installed on the exposed handrail guide 45. More specifically, as shown in FIG. 10, the connection fitting 12 connecting the upper main body 10 and the lower main body 11 is released, and the upper main body 10 is tilted counterclockwise around the hinge 24 to form a plurality of strips. While the handrail 1 is inserted between the upper main body 10 and the lower main body 11 so that the handrail 1 is located in the space facing the upper main body 10 in which the shielding body 16 is disposed, the upper main body 10 is returned and the connecting fitting 12 is used. It is combined with the lower body 11. Along with this work, the X-ray flaw detector 9 is installed so as to be able to travel along the handrail guide 45 by the holding device 48 provided below the lower main body 11. That is, the X-ray flaw detector 9 is arranged with the roller 19 positioned on the handrail guide 45, and the handrail guide 45 is sandwiched between the pair of engagement portions 22A and 22B while operating the operation portion 21. When the X-ray flaw detector 9 is supported by rolling in, the X-ray flaw detector 9 can be run along the handrail guide 45 while rolling the roller 19. After the handrail 1, which is the object to be inspected, is arranged between the X-ray generation unit 8 and the X-ray image receiving unit 14, when the X-ray is irradiated from the X-ray generation unit 8, the X-ray passes through the handrail 1 By projecting the steel cord 1B embedded in the image receiving section 14, the presence or absence of the damage and the degree of damage can be observed in detail.
[0013]
In order to use such an X-ray flaw detector 9 efficiently, it is preferable to use the X-ray flaw detector 9 together with the handle checker 6 shown in FIGS.
First, the handle checker 6 will be described with reference to FIGS. 4 and 5 which are a front sectional view and a side sectional view. The substantially E-shaped detector 4 is provided with exciting means at its open ends facing the handrail 1. There are certain permanent magnets 5A, 5B, and opposed detection pieces 4a, 4b are provided at the center thereof with an interval Y, and opposed detection coils Ka, Kb are wound around the opposed detection pieces 4a, 4b, respectively. These are connected in reverse series, and output terminals a and b are taken out.
[0014]
Now, when the handle checker 6 is installed on the handrail 1, the steel cord 1B of the handrail 1 is excited in the longitudinal direction by the main magnetic flux Φ0 by the permanent magnets 5A and 5B. At this time, since a plurality of steel cords 1B inside the handrail 1 are arranged side by side as shown in FIG. 2, the width X of the steel cords 1B arranged side by side as shown in FIG. 3 is evenly excited. . At this time, if the steel cord 1B is in a normal state, no leakage magnetic flux is generated, and there is no detection by the opposed detection pieces 4a and 4b. On the other hand, if the steel cord 1B is damaged such as breakage, a magnetic circuit is formed in the plurality of steel cords 1B in the longitudinal direction by the main magnetic flux Φ0, and leakage magnetic flux is generated from a damaged portion such as disconnection. This leakage magnetic flux is detected by the opposed detection pieces 4a and 4b of the detection body 4. An indicator meter is connected to the output terminals a and b to display the occurrence of abnormal magnetic flux leakage, and an alarm buzzer is connected to sound the alarm buzzer when the magnetic flux leakage exceeds a predetermined value. I have. Further, a recording device may be connected to the output terminals a and b, and the detection result of the broken steel cord 1B may be recorded on the recording chart paper 8 as shown in FIG. Corresponds to the broken portion of the steel cord 1B. Since the steel cord 1B may spread in the width direction when the wire breaks or peels off from the rubber, the opposite detection pieces 4a and 4b of the detection body 4 are made larger than the width dimension X of the steel cord 1B to detect damage. In order to improve the detection sensitivity and the detection accuracy by enlarging the width, the distance Y between the opposed detection pieces 4a and 4b formed in the traveling direction is set to 5 mm or less, so that the above-described leakage magnetic flux can be efficiently detected. it can.
[0015]
Next, a flaw detection operation of the handrail for the man conveyor will be described with reference to a flowchart shown in FIG.
First, step S1 detects the state of the steel cord 1B embedded in the handrail 1 using the handrail checker 6 as a first flaw detection process. The handrail 1 of the conveyer is driven by the driving pulley 2 as shown in FIG. 7, and is moved in the same direction in synchronization with the step 3 so that the passenger riding on the step 3 does not fall down. The handrail 1 is configured by embedding a plurality of steel cords 1B in the axial direction as shown in FIG. 8 which is a sectional view. As shown in FIG. 7, the handrail checker 6 is mounted on the handrail 1 of the man conveyor, and the handrail 1 is inspected during the operation of the man conveyor. If the steel cord 1B is damaged, the leakage magnetic flux is detected by the above-described principle of the handrail checker 6 as shown in step S2, and an abnormal portion is notified by a display or a buzzer. At this time, as shown in step S3, a location corresponding to the abnormality of the handrail 1 is marked with a tape or the like, and an output waveform of the handrail checker 6 at the location corresponding to the abnormality of the handrail 1, as shown in FIG. Observing the waveform of the recording chart paper 8 shown in (1), if it is determined that the peak exceeds a predetermined value and is abnormal, the process proceeds to step S5 to perform the flaw detection by the X-ray flaw detector 9 as a second flaw detection process. .
[0016]
This is performed based on step S5. As shown in FIG. 11, the handrail 1 in the lower horizontal portion is removed from the handrail guide 45, and the X-ray flaw detector 9 is installed on the exposed handrail guide 45. More specifically, as shown in FIG. 10, the connection fitting 12 connecting the upper main body 10 and the lower main body 11 is released, and the upper main body 10 is tilted counterclockwise around the hinge 24 to form a plurality of strips. While the handrail 1 is inserted between the upper main body 10 and the lower main body 11 so that the handrail 1 is located in the space facing the upper main body 10 in which the shielding body 16 is disposed, the upper main body 10 is returned and the connecting fitting 12 is used. It is combined with the lower body 11. Along with this work, the X-ray flaw detector 9 is installed along the handrail guide 45 so as to be able to travel along the handrail guide 45 by the holding device 48 arranged below the lower main body 11 as shown in step S6. As shown in FIG. 10, the X-ray flaw detector 9 is arranged by positioning the roller 19 on the handrail guide 45, and the hand is held between the pair of engagement portions 22A and 22B while operating the operation portion 21. The X-ray flaw detector 9 is supported by sandwiching the rail guide 45. This sandwiching is such that the X-ray flaw detector 9 can be moved along the handrail guide 45 while rolling the roller 19, and the handrail 1 at the position marked in step S3 is moved by the X-ray flaw detector. The position is selected so as to be located within 9. If the sandwiching by the engaging portions 22A and 22B prevents the movement of the X-ray flaw detector 9, the operating portion 21 is operated to loosen a little between the engaging portions 22A and 22B. After the 9 is moved, the operating unit 21 may be operated again to sandwich the handrail guide 45 between the pair of engaging portions 22A and 22B to support the X-ray flaw detector 9.
[0017]
In this state, power of the X-ray inspection apparatus 9, as shown in step S7, the steel cord of the X-ray flaw detector 9 while the eye view of the X-ray image receiving portion 14 from the top of the X-ray inspection device 9 handrail 1 Fine adjustment is made to correspond to the damaged part of 1B. This adjustment does not require moving the handrail 1. In other words, since the X-ray flaw detector 9 is movably supported on the lower horizontal part of the handrail 1, if the marked position of the handrail 1 is positioned on the lower horizontal part before the X-ray flaw detector 9 is installed. By simply moving the X-ray flaw detector 9 along the handrail guide 45, it is possible to easily cope with the problem. If the positional relations correspond to each other, a VTR or a polaroid camera is attached to the X-ray flaw detector 9 as shown in step S9, and the X-ray image receiving unit 14 is photographed and recorded. At this time, unlike the handrail checker 6, the degree of damage to the steel cord 1B can be clearly understood only by looking into the X-ray image receiving unit 14 of the X-ray flaw detector 9, so that the steel cord 1B should be replaced or should be replaced in the future. Can be determined accurately and immediately. In addition, since the damage position is grasped in advance by the handrail checker 6, the operation time of the X-ray flaw detector 9 can be shortened, which is extremely safe. Thereafter, the power of the X-ray flaw detector 9 is turned off as shown in step S10, the X-ray flaw detector 9 is detached from the handrail guide 45 as shown in step S11, and the handrail 1 is moved to the handrail guide as shown in step S12. 45, and the operation is completed.
[0018]
The handrail flaw detection method described above includes a first flaw detection step of detecting a damaged position by the handrail checker 6, a step of marking when the first flaw detection step detects the position, and a detection of the marked position. It comprises a second flaw detection process performed by the X-ray flaw detector 9, but the handrail checker 6 used in the first flaw detection process is not limited to the above-described system, and can be performed by something other than the X-ray flaw detector 9. it can.
[0019]
FIG. 12 shows an X-ray flaw detector 9 according to another embodiment of the present invention. The X-ray flaw detector 9 is configured by connecting the upper main body 10 and the lower main body 11 so as to be openable and closable by a connecting device such as a connecting fitting 12 or a hinge 24. However, the upper main body 10 and the lower main body 11 are formed into a U-shape. An insertion portion of the handrail 1 is formed in the U-shaped opposed space portion, and the periphery thereof is shielded as necessary by an X-ray shield 46 having a strip shape and giving followability. I have. According to such a configuration, after supporting the X-ray flaw detector 9 on the handrail guide 45, the handrail 1 can be arranged at a predetermined position simply by inserting the handrail 1 into the U-shaped opposed space portion. Workability is improved. Other configurations in the upper main body 10 and the lower main body 11 are the same as those in the above-described embodiment, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.
[0020]
【The invention's effect】
As described above, the X-ray flaw detector for a handrail for a conveyor according to the present invention uses an X-ray flaw detector capable of performing high-precision flaw detection, and the X-ray flaw detector is attached to a handrail guide with the handrail removed. The handrail removed from the handrail guide is arranged in the opposing gap between the X-ray generation unit and the X-ray image receiving unit of the X-ray flaw detection device, so that the X-ray is not dismantled from the man conveyor. The state of the steel cord in the handrail is displayed on the image receiving unit, and can be easily and quickly verified on the spot.
[Brief description of the drawings]
FIG. 1 is a cross-sectional front view of an upper part of an X-ray flaw detector according to one embodiment of the present invention.
FIG. 2 is a side view of the X-ray flaw detector shown in FIG.
FIG. 3 is a circuit diagram showing an X-ray generation unit of the X-ray flaw detector shown in FIG.
FIG. 4 is a front sectional view of the handle checker.
FIG. 5 is a side sectional view of the handle checker shown in FIG. 4;
FIG. 6 is a flowchart showing a flaw detection operation using the X-ray flaw detector shown in FIG.
FIG. 7 is a side view of the man conveyor showing a use state of the handle checker shown in FIG. 4;
FIG. 8 is a sectional view of a handrail of the man conveyor shown in FIG. 7;
FIG. 9 is a plan view of a recording chart paper showing a result of flaw detection by the handle checker shown in FIG. 3;
FIG. 10 is a side view showing a state in which the X-ray flaw detector shown in FIG. 1 is being mounted.
FIG. 11 is a side view of the man conveyor showing a use state of the X-ray flaw detector shown in FIG. 1;
FIG. 12 is a perspective view showing an X-ray flaw detector according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Handrail 1B Steel cord 9 X-ray flaw detector 10 Upper main body 11 Lower main body 14 X-ray image receiving part 17 X-ray tube 45 Handrail guide 48 Support device

Claims (4)

  1. Comprising a handrail guided by the handrail guide, the X-ray inspection apparatus of passenger conveyor for handrail damage to the steel cord is detected by the X-ray flaw detector in this handrail, the X-ray flaw detector, the predetermined And an X-ray generating unit and an X-ray image receiving unit arranged via the opposing space. The X-ray flaw detector is supported by the handrail guide from which the handrail is removed. An X-ray flaw detector for a handrail for a man conveyor, wherein the handrail detached from the handrail guide is arranged in the facing space between the X-ray generation unit and the X-ray image receiving unit.
  2. 2. The X-ray flaw detector according to claim 1, wherein the X-ray flaw detector includes a lower main body containing the X-ray generation unit, an upper main body containing the X-ray image receiving unit, and the facing unit formed on a facing portion between the two main bodies. A space, and a connecting portion that connects the lower body and the upper body so as to be separable, and the handrail removed from the handrail guide is arranged in the facing space when the connecting portion is opened. A handrail X-ray flaw detector for a man conveyor.
  3. 2. The X-ray flaw detector according to claim 1, wherein the lower main body containing the X-ray generating unit and the upper main body containing the X-ray receiving unit are integrally formed in a substantially U-shape. An X-ray flaw detector for a handrail for a man conveyor, comprising:
  4. 2. The X-ray flaw detector for a handrail for a man-conveyor according to claim 1, wherein the X-ray flaw detector is supported so as to run along the handrail guide.
JP16745496A 1996-06-27 1996-06-27 X-ray flaw detector for handrail for man conveyor Expired - Fee Related JP3547260B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16745496A JP3547260B2 (en) 1996-06-27 1996-06-27 X-ray flaw detector for handrail for man conveyor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16745496A JP3547260B2 (en) 1996-06-27 1996-06-27 X-ray flaw detector for handrail for man conveyor

Publications (2)

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JPH1010060A JPH1010060A (en) 1998-01-16
JP3547260B2 true JP3547260B2 (en) 2004-07-28

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
JP2014152001A (en) * 2013-02-07 2014-08-25 Hitachi Building Systems Co Ltd Flaw detection device for moving handrail of passenger conveyor

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
JP4951678B2 (en) * 2010-01-08 2012-06-13 株式会社日立ビルシステム Passenger conveyor handrail inspection device
JP5200048B2 (en) * 2010-03-24 2013-05-15 株式会社日立ビルシステム X-ray inspection equipment
JP5221588B2 (en) * 2010-04-13 2013-06-26 株式会社日立ビルシステム Deterioration diagnosis device for moving handrails of passenger conveyors
JP5286331B2 (en) * 2010-07-12 2013-09-11 株式会社日立製作所 Passenger conveyor handrail inspection device and passenger conveyor maintenance method
JP5463320B2 (en) * 2011-04-07 2014-04-09 株式会社日立ビルシステム Passenger conveyor handrail inspection method
JP6539238B2 (en) * 2016-09-12 2019-07-03 株式会社日立ビルシステム Moving handrail flaw detector for passenger conveyor
WO2020075302A1 (en) * 2018-10-12 2020-04-16 三菱電機株式会社 Passenger conveyor handrail tensile body inspection device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014152001A (en) * 2013-02-07 2014-08-25 Hitachi Building Systems Co Ltd Flaw detection device for moving handrail of passenger conveyor

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